(1973). evolution of the structure of fixed investment in foreign oil companies working in iraq during the period 1957-1958 and its relation to the petroleum sectors contribution to the national economy of iraq. , 1(1), 13-30.

. "evolution of the structure of fixed investment in foreign oil companies working in iraq during the period 1957-1958 and its relation to the petroleum sectors contribution to the national economy of iraq". , 1, 1, 1973, 13-30.

(1973). 'evolution of the structure of fixed investment in foreign oil companies working in iraq during the period 1957-1958 and its relation to the petroleum sectors contribution to the national economy of iraq', , 1(1), pp. 13-30.

evolution of the structure of fixed investment in foreign oil companies working in iraq during the period 1957-1958 and its relation to the petroleum sectors contribution to the national economy of iraq. , 1973; 1(1): 13-30.